At an NGDF conference many years ago, asymetrical involvement of the eye muscles was discussed as an indicator of TED. In other words, it was not expected – back then, at least – that both eyes would be impacted identically. Obvioulsy, I'm not a doctor, so I am not “up” on the current research.
As far as “typical” early symptoms of TED, I'm not sure there are any. Some folks have rather serous extrusion of their eyes (protopsis, or exopthalmos), without doubling of vision, while others of us have doubling without significant exopthalmos. Also, having “some” symptoms of TED doesn't mean one will go on to having all of them. I had serious doubling of vision, but did not go on to the type of horrid eye disease that others of us get.
I eventually was given an ultrasound of the eye muscles that demonstrated TED – although the diagnosis had been at least tentatively made before then.
I never experienced the sensation of “pressure.” That does not mean, however, that it is never an indicator. It just was not part of what I experienced.
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